AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2025-01-22 07:44:54 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity
b67a95f2ab
linux_dsm_epyc7002/arch/powerpc
History
Cédric Le Goater b67a95f2ab powerpc/xive: Skip ioremap() of ESB pages for LSI interrupts 
The PCI INTx interrupts and other LSI interrupts are handled differently
under a sPAPR platform. When the interrupt source characteristics are
queried, the hypervisor returns an H_INT_ESB flag to inform the OS
that it should be using the H_INT_ESB hcall for interrupt management
and not loads and stores on the interrupt ESB pages.

A default -1 value is returned for the addresses of the ESB pages. The
driver ignores this condition today and performs a bogus IO mapping.
Recent changes and the DEBUG_VM configuration option make the bug
visible with :

  kernel BUG at arch/powerpc/include/asm/book3s/64/pgtable.h:612!
  Oops: Exception in kernel mode, sig: 5 [#1]
  LE PAGE_SIZE=64K MMU=Radix MMU=Hash SMP NR_CPUS=1024 NUMA pSeries
  Modules linked in:
  CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.4.0-0.rc6.git0.1.fc32.ppc64le #1
  NIP:  c000000000f63294 LR: c000000000f62e44 CTR: 0000000000000000
  REGS: c0000000fa45f0d0 TRAP: 0700   Not tainted  (5.4.0-0.rc6.git0.1.fc32.ppc64le)
  ...
  NIP ioremap_page_range+0x4c4/0x6e0
  LR  ioremap_page_range+0x74/0x6e0
  Call Trace:
    ioremap_page_range+0x74/0x6e0 (unreliable)
    do_ioremap+0x8c/0x120
    __ioremap_caller+0x128/0x140
    ioremap+0x30/0x50
    xive_spapr_populate_irq_data+0x170/0x260
    xive_irq_domain_map+0x8c/0x170
    irq_domain_associate+0xb4/0x2d0
    irq_create_mapping+0x1e0/0x3b0
    irq_create_fwspec_mapping+0x27c/0x3e0
    irq_create_of_mapping+0x98/0xb0
    of_irq_parse_and_map_pci+0x168/0x230
    pcibios_setup_device+0x88/0x250
    pcibios_setup_bus_devices+0x54/0x100
    __of_scan_bus+0x160/0x310
    pcibios_scan_phb+0x330/0x390
    pcibios_init+0x8c/0x128
    do_one_initcall+0x60/0x2c0
    kernel_init_freeable+0x290/0x378
    kernel_init+0x2c/0x148
    ret_from_kernel_thread+0x5c/0x80

Fixes: bed81ee181 ("powerpc/xive: introduce H_INT_ESB hcall")
Cc: stable@vger.kernel.org # v4.14+
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Tested-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20191203163642.2428-1-clg@kaod.org
2019-12-05 00:11:45 +11:00
..
boot Devicetree updates for v5.5: 2019-12-02 11:41:35 -08:00
configs Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace 2019-12-01 13:26:18 -08:00
crypto powerpc updates for 5.5 2019-11-30 14:35:43 -08:00
include pci-v5.5-changes 2019-12-03 13:58:22 -08:00
kernel powerpc/kasan: Fix boot failure with RELOCATABLE && FSL_BOOKE 2019-12-05 00:11:43 +11:00
kexec powerpc: Avoid clang warnings around setjmp and longjmp 2019-11-25 21:45:43 +11:00
kvm powerpc fixes for Spectre-RSB 2019-11-27 11:25:04 -08:00
lib powerpc/memcpy: Fix stack corruption for smaller sizes 2019-09-12 09:27:00 +10:00
math-emu
mm Merge branch 'akpm' (patches from Andrew) 2019-12-01 20:36:41 -08:00
net powerpc/bpf: Fix tail call implementation 2019-11-02 00:32:26 +01:00
oprofile
perf powerpc updates for 5.5 2019-11-30 14:35:43 -08:00
platforms libnvdimm for 5.5 2019-12-01 18:43:25 -08:00
purgatory
sysdev powerpc/xive: Skip ioremap() of ESB pages for LSI interrupts 2019-12-05 00:11:45 +11:00
tools powerpc/tools: Don't quote $objdump in scripts 2019-10-30 22:55:12 +11:00
xmon powerpc: Avoid clang warnings around setjmp and longjmp 2019-11-25 21:45:43 +11:00
Kbuild powerpc/kexec: Move kexec files into a dedicated subdir. 2019-11-21 15:41:34 +11:00
Kconfig powerpc: Add support for GENERIC_EARLY_IOREMAP 2019-11-19 19:38:38 +11:00
Kconfig.debug powerpc: Fix Kconfig indentation 2019-11-25 21:45:43 +11:00
Makefile powerpc: Don't add -mabi= flags when building with Clang 2019-11-25 21:45:43 +11:00
Makefile.postlink kbuild: add $(BASH) to run scripts with bash-extension 2019-09-04 22:54:13 +09:00